Automotive Air Conditioning Information Forum

Hi all,

About 3 years back I redid the AC on my '74 Porsche 914. Flushed everything, new compressor and other bits, redid all of the hoses and fittings with aeroquip components. Held vacuum great for over a month. Blows ice cold. Kept it as R12.

Fast forward approx 3 years later, not blowing cold. Needed about a pound of R12 to get back to specified pressures. Again, ice cold. Now the question is, "where is it leaking from".

I ran sniffer along system and discovered that if I get right on top of the fittings, where they meet end of hose, that I get some beeping. Unfortunately, not just one connector but multiple. They are all assembled correctly using aeroquip cages and tool. Needless to say, I am pretty dissapointed at this outcome.

Not sure what best course of action is short of replacing everything. Was considering applying a poly or epoxy sealant where end of hose meets fitting but not sure if that would work.

Any ideas or similar experience welcomed.

Thanks.

Contact Aeroquip and find out what the annual permissible leak rate is for that fitting. Everything leaks a little. You are losing a pound in 3 years across 8 fittings and several feet of hose.

Commercial stationary comfort refrigeration is allowed to leak 10% of the total charge per year by the EPA Above that it must be repaired. Process refrigeration can leak 20% Those are brazed all metal systems.

Leak rate sounds like most 1970's cars. Perhaps Aeroquip has some suggestions or input.

Reached out to them (Eaton) via their web site. Never got a reply.